How do I add another business account to Intuit quickbooks?

Hi there, phylliswh.

I understand the importance of adding another company to your current account. Allow me to share some insights about this.

In QuickBooks Online (QBO), you can create multiple companies under the same account. However, each file has its own paid subscription. It is one way to ensure none of your business transactions and details are recorded in the wrong area. At this time, merging two companies in QBO isn't possible. 

To add a new company, visit our QuickBooks Pricing page and select the plan that meets your business needs. Then, follow the on-screen instructions to create a new company file.

Once done, QuickBooks asks which company file you want to open when you sign into your account. To switch between companies, click Settings, then Switch company.

Alternatively, you may consider 4Gal's suggestion to use QuickBooks Desktop to manage multiple company files. You can download the trial version to decide if the product is the right one for you.

Aside from that, you can also utilize the Class tracking feature that is available in QBO Plus and Advanced versions to track your data by departments or other segments in your business. 

Here are some resources you can use as a reference:

• Get started with class tracking in QBO.
• Track your transactions by class.

Please know that you can post again in this thread if you need more help managing your books in QBO. I'm always ready to assist.